646467 has 8 divisors (see below), whose sum is σ = 866640. Its totient is φ = 428640.

The previous prime is 646453. The next prime is 646519. The reversal of 646467 is 764646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646467 - 2⁶ = 646403 is a prime.

646467 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 646467.

It is not an unprimeable number, because it can be changed into a prime (646067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217 + ... + 1157.

It is an arithmetic number, because the mean of its divisors is an integer number (108330).

2⁶⁴⁶⁴⁶⁷ is an apocalyptic number.

646467 is a deficient number, since it is larger than the sum of its proper divisors (220173).

646467 is a wasteful number, since it uses less digits than its factorization.

646467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173.

The product of its digits is 24192, while the sum is 33.

The square root of 646467 is about 804.0317157924. The cubic root of 646467 is about 86.4666805637.

The spelling of 646467 in words is "six hundred forty-six thousand, four hundred sixty-seven".